Setting Up a TWAMP Generator Configuration Job
- 19 Dec 2023
- 4 Minutes to read
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Setting Up a TWAMP Generator Configuration Job
- Updated on 19 Dec 2023
- 4 Minutes to read
- Contributors
- Print
- DarkLight
- PDF
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You can set up a configuration job to configure Skylight elements to generate TWAMP sessions.
To set up a TWAMP Generator configuration job
Access the page Commission ▶ Jobs.
Set all common configuration job settings, as described in "Creating Configuration Jobs in GUI Mode" and "Creating Configuration Jobs Using Data Sets".
Select TWAMP Generator in the left pane. The TWAMP Generator tab is displayed.
Complete all fields for the session (a row in the table) as required. For more information on the parameters in the TWAMP Generator tab, see the table below.
If you want to define more sessions, click the Add
button, or select a row in the table and click the Duplicate 
button. Complete the fields as required.Click Apply, then click Close.
Click the Refresh
button to refresh the user interface.
button, or select a row in the table and click the Duplicate 
button. Complete the fields as required.
button to refresh the user interface.TWAMP Generator tab (Commission ▶ Jobs)
General
| Parameter | Description |
|---|---|
| Enable | The state of the TWAMP session. When enabled, TWAMP packets are sent at the specified interval. |
| Session name | Name for the TWAMP session. |
| Interval | Sampling period. A minimum of 10 samples per Reference period is required for minimum/average/maximum calculations. A value in milliseconds. Default: 1,000 ms |
| Reference period | The reference period for the TWAMP session. A value in minutes. Default: 15 minutes Range: 1 to 1,440 minutes Note: This value must be at least 10 times the Interval value. |
| Packet size | The size of the TWAMP packet payload. Does not include protocol headers (VLAN tags, UDP, IP, Ethernet) or the four FCS bytes. A value in bytes. Default value: 41 bytes Possible values: 14 to 1,472 Note: If you choose to use a packet size smaller than 41 bytes, you must ensure that the reflector being used supports frame padding, as defined by RFC5357. If you observe that packets are not being reflected, try increasing the packet size to at least 41 bytes. |
UDP
| Parameter | Description |
|---|---|
| Destination IP | IP address of the TWAMP reflector |
| Source UDP port | UDP port of the source system (the element being configured). |
| Destination UDP port | UDP port of the destination system (the TWAMP reflector). |
| DSCP | Differentiated Services Code Point class selector. Default value: 0 Range: 0 to 63 |
| ECN | Explicit Congestion Notification. Default value: 0 Range: 0 to 3 |
| VLAN 1 priority | VLAN 1 priority value. Applies when VLAN 1 encapsulation is enabled. This priority overwrites the PCP value assigned by the VLAN interface, if any. Default value: 0 Range: 0 to 7 |
Packet loss
| Parameter | Description |
|---|---|
| Packet loss rate | Packet loss is the ratio between the number of packets that were lost during the period and the total number of packets that were sent. This parameter sets the threshold (expressed as a percentage) at which an Excessive Packet Loss (EPL) alarm is triggered. A percentage value Default value: 10 Range: 0 to 100 |
| Continuity check threshold | The number of consecutive sampling periods that can be lost before triggering the Continuity Loss alarm. The alarm status is rounded up to the next full second. Default value: 10 Range: 2 to 200 |
Two-way, One-way near-end, One-way far-end (alarm thresholds for two-way and one-way measurements)
| Parameter | Description |
|---|---|
| Maximum delay | The delay allowed for each sample in the Reference period. This value is used in conjunction with Delay thresh. to trigger an alarm:
Default value for two-way measurements: 100,000 Default value for one-way measurements: 50,000 |
| Delay thresh. | Delay threshold. The number of consecutive samples exceeding the Maximum delay that are allowed before triggering a delay alarm for a Reference period. Value is a number of samples. Default value for two-way measurements: 4 Default value for one-way measurements: 4 |
| Avg. delay thresh. | The average delay is calculated from samples taken during the reference period. Exceeding this threshold triggers an alarm:
Default value for two-way measurements: 100,000 Default value for one-way measurements: 50,000 |
| Maximum delay variation | The maximum delay variation to monitor during a test period. This value is used in conjunction with the Delay variation thresh. to trigger an alarm:
Default value for two-way measurements: 10,000 Default value for one-way measurements: 10,000 |
| Delay variation thresh. | Delay variation threshold. The number of consecutive samples exceeding the Maximum delay variation that are allowed before triggering a delay variation alarm for a Reference period. Value is a number of samples. Default value for two-way measurements: 4 Default value for one-way measurements: 4 |
| Avg. delay variation thresh. | The average two-way delay variation is calculated from samples taken during the reference period. Exceeding this threshold triggers an alarm:
Default value for two-way measurements: 10,000 Default value for one-way measurements: 2,000 |
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